diff --git a/server/src/main/java/org/eclipse/openvsx/UserService.java b/server/src/main/java/org/eclipse/openvsx/UserService.java
index 464ba3b8f..07e6b9873 100644
--- a/server/src/main/java/org/eclipse/openvsx/UserService.java
+++ b/server/src/main/java/org/eclipse/openvsx/UserService.java
@@ -32,6 +32,7 @@
 import org.eclipse.openvsx.storage.StorageUtilService;
 import org.eclipse.openvsx.util.*;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.security.core.context.SecurityContextHolder;
@@ -55,13 +56,15 @@ public class UserService {
     private final RepositoryService repositories;
     private final StorageUtilService storageUtil;
     private final CacheService cache;
+    private final ApplicationEventPublisher eventPublisher;
     private final ExtensionValidator validator;
     private final ClientRegistrationRepository clientRegistrationRepository;
     private final OAuth2AttributesConfig attributesConfig;
 
     @Value("${ovsx.token-prefix:}")
     String tokenPrefix;
-
+    
+    @Autowired
     public UserService(
             EntityManager entityManager,
             RepositoryService repositories,
@@ -78,6 +81,7 @@ public UserService(
         this.validator = validator;
         this.clientRegistrationRepository = clientRegistrationRepository;
         this.attributesConfig = attributesConfig;
+        this.eventPublisher = eventPublisher;
     }
 
     public UserData findLoggedInUser() {
@@ -144,6 +148,7 @@ public ResultJson removeNamespaceMember(Namespace namespace, UserData user) thro
             throw new ErrorResultException("User " + user.getLoginName() + " is not a member of " + namespace.getName() + ".");
         }
         entityManager.remove(membership);
+        eventPublisher.publishEvent(new org.eclipse.openvsx.events.NamespaceMembershipChangedEvent(this, namespace));
         return ResultJson.success("Removed " + user.getLoginName() + " from namespace " + namespace.getName() + ".");
     }
 
@@ -159,6 +164,7 @@ public ResultJson addNamespaceMember(Namespace namespace, UserData user, String
                 throw new ErrorResultException("User " + user.getLoginName() + " already has the role " + role + ".");
             }
             membership.setRole(role);
+            eventPublisher.publishEvent(new org.eclipse.openvsx.events.NamespaceMembershipChangedEvent(this, namespace));
             return ResultJson.success("Changed role of " + user.getLoginName() + " in " + namespace.getName() + " to " + role + ".");
         }
         membership = new NamespaceMembership();
@@ -166,6 +172,7 @@ public ResultJson addNamespaceMember(Namespace namespace, UserData user, String
         membership.setUser(user);
         membership.setRole(role);
         entityManager.persist(membership);
+        eventPublisher.publishEvent(new org.eclipse.openvsx.events.NamespaceMembershipChangedEvent(this, namespace));
         return ResultJson.success("Added " + user.getLoginName() + " as " + role + " of " + namespace.getName() + ".");
     }
 
diff --git a/server/src/main/java/org/eclipse/openvsx/events/NamespaceMebershipChangedListener.java b/server/src/main/java/org/eclipse/openvsx/events/NamespaceMebershipChangedListener.java
new file mode 100644
index 000000000..01fc3c0df
--- /dev/null
+++ b/server/src/main/java/org/eclipse/openvsx/events/NamespaceMebershipChangedListener.java
@@ -0,0 +1,25 @@
+package org.eclipse.openvsx.events;
+
+import org.eclipse.openvsx.cache.CacheService;
+import org.eclipse.openvsx.entities.Namespace;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.event.TransactionalEventListener;
+import org.springframework.transaction.event.TransactionPhase;
+
+@Component
+public class NamespaceMembershipChangedListener {
+    private final CacheService cacheService;
+
+    @Autowired
+    public NamespaceMembershipChangedListener(CacheService cacheService) {
+        this.cacheService = cacheService;
+    }
+
+    @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT)
+    public void onNamespaceMembershipChanged(NamespaceMembershipChangedEvent event) {
+        Namespace namespace = event.getNamespace();
+        cacheService.evictNamespaceDetails(namespace);
+    }
+}
\ No newline at end of file
diff --git a/server/src/main/java/org/eclipse/openvsx/events/NamespaceMembershipChangedEvent.java b/server/src/main/java/org/eclipse/openvsx/events/NamespaceMembershipChangedEvent.java
new file mode 100644
index 000000000..a132cb7a9
--- /dev/null
+++ b/server/src/main/java/org/eclipse/openvsx/events/NamespaceMembershipChangedEvent.java
@@ -0,0 +1,17 @@
+package org.eclipse.openvsx.events;
+
+import org.eclipse.openvsx.entities.Namespace;
+import org.springframework.context.ApplicationEvent;
+
+public class NamespaceMembershipChangedEvent extends ApplicationEvent {
+    private final Namespace namespace;
+
+    public NamespaceMembershipChangedEvent(Object source, Namespace namespace) {
+        super(source);
+        this.namespace = namespace;
+    }
+
+    public Namespace getNamespace() {
+        return namespace;
+    }
+}